GHSA-CW3J-28QQ-X3XH: hono Npm
Vulnerability summary
GHSA-CW3J-28QQ-X3XH is a medium (CVSS 6.9) vulnerability in hono Npm.
Advisory lineage
Upstream 0 · Downstream 1Timeline
- 01-07-2026PublishedVulnerability first disclosed.
- 02-10-2026Last modifiedVulnerability information updated.
Description
Duplicate Advisory: Hono vulnerable to Vary Header Injection leading to potential CORS Bypass ## Duplicate Advisory This advisory has been withdrawn because it is a duplicate of GHSA-q7jf-gf43-6x6p. This link is maintained to preserve external references. ## Original Description Hono before 4.10.2 (fixed in 4.10.3) contains a flaw in its CORS middleware: when the origin is not set to "*", the middleware copies the Vary header from the incoming request into the response. Because Vary is a response header that should be managed by the server, an attacker can supply arbitrary Vary values that are reflected into the response, potentially causing cache key pollution and inconsistent CORS enforcement in environments that rely on shared caches or proxies.
CVSS metrics
2 scores · 1 source · 2 versionsEPSS trend
No EPSS score has been published for this record yet.
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeNo weakness data has been published for this record.
Affected systems
Npm1 product
- honoAll versions (No fix recorded)
1 vendor · 1 product
